Entry level fat bike

I am new to the group and have been contemplating the purchase of a fat bike. I have spent a lot of time on line and reading various blogs / forums on the different kinds of fatties.

My purpose for the fattie would be number one to have fun, ride some trails and lots of sand. Again i am new at MTB, for it has been many years.

I am not in a position at this time to drop 2K+ on a bike, so i was looking at purchasing a used one. I am looking for comments/opinions on the Tommi Sea trail destroyer. I have found one that i can pick up for about $700.

I have never been fond of the walmart bike concept. I agree 100% with the Pugs and Muks.
I thank everyone that took time to comment on this post, all information and opioions are appreciated.

I ran accross a Jommi Sea ,Fat Sand Bike, that had 8 speed internal hub and near new condition. I was thinking that this would give me a platform that would allow me to have more parts compatability the like. I will be riding trails and sand mostly.